Anker is good. The limit for USB-C cables is normal ones go to 60W, marked ones go to 100W. The cables are passive except for the marker chip. It is the charger that does USB-PD. Do you have it plugged into regular charger that does 15W, or USB-PD charger that does more?

I guess you could have a bad cable where the CC wire has broken and can't do USB-PD.